Mack tells Rolling Stone that he came up with the tune on the night he marched in a protest after hearing Ferguson cop Darren Wilson wouldn't be indicted in the death of Michael Brown -- and he felt "physically sick." He says, "If I'm put on blast, critiqued, broken down, questioned -- all those things will happen, and they are completely valid. That's part of the design of the conversation... People get put into boxes, and the conversation around cultural appropriation -- I was at the forefront of that, rightfully so. And that conversation also included Miley Cyrus and Iggy Azalea, and that's why their names are on the record."

"White Privilege II" will appear on This Unholy Mess I've Made, which drops on February 26.